Fickert brush: 1.Abrasive brush 2.Applying to ceramic,granite,artifical stone and glazed brick. 3.Grain:From 36# to 500# Antique abrasive brush:1.Product information 1.Producing an antique look (angeing finish) on the marble, granite, stone slab ect.2.Type of brush:fickert brush, frankfurt brush and round brush.3.Grain:36#, 46#, 60#, 80#, 120#, 180#, 240#, 320#, 500#.